EUVD-2026-63111
GHSA-fp6q-c27c-462m
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access and low-privileged account required; token interception yields full confidentiality, integrity, and availability impact within Splunk's scope.
Primary rating from Vendor (cisco).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
6DescriptionNVD
In Splunk Enterprise for Windows versions below 10.4.2, 10.2.6, 10.0.9, 9.4.13, and 9.3.14, a local user with access to the Windows host could bind to the management port before Splunk Enterprise starts, intercept authentication tokens from child processes, and use those tokens to compromise all relevant data and system integrity available to the user account running Splunk Enterprise. The vulnerability is possible because the Windows management-port listener does not apply exclusive address binding protections before the service starts.
AnalysisAI
Splunk Enterprise for Windows exposes a startup race condition on the management port that allows a low-privileged local user to intercept authentication tokens from Splunk child processes. By pre-binding the management port before the Splunk service initializes - exploiting the absence of exclusive address binding protections on Windows - an attacker captures session tokens that can be replayed to compromise all data and system integrity accessible to the Splunk service account. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must have a local interactive or remote desktop session on the Windows host running Splunk Enterprise (AV:L confirmed by CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 (High) with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately reflects the attack surface: local access is required, complexity is low once on the host, and only low-privileged credentials are needed. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with a low-privileged local Windows account on the Splunk host runs a listener bound to TCP port 8089 (the Splunk management port) and waits for a Splunk service restart or system reboot. When Splunk initializes, its child processes send authentication tokens to the pre-bound attacker listener instead of the legitimate management service; the attacker captures these tokens and replays them against the Splunk REST API to access indexed data, configuration, and capabilities under the Splunk service account. … |
| Remediation | Upgrade Splunk Enterprise for Windows to the fixed versions: 9.3.14, 9.4.13, 10.0.9, 10.2.6, or 10.4.2, per the vendor advisory at https://advisory.splunk.com/advisories/SVD-2026-0801. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems running Splunk Enterprise and document current patch levels. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
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